Eopelobates bayeri

Overview

Eopelobates bayeri is an extinct frog whose growth is studied from tadpoles and young individuals. Unlike an organism preserved in only one form, it allows several stages of body transformation to be compared. Ancient frogs also passed through different forms as they grew.^[1]

Key facts

Fossils of the same species range from tadpoles to young frogs. Material from Bechlejovice in Czechia includes tadpoles and young individuals at different developmental stages. Placing differently sized fossils side by side allows growth through time to be studied.^[1]

Time and place

It is studied from Late Oligocene material at Bechlejovice in present-day Czechia. The Oligocene spans approximately 34–23 million years ago. Small fossils from this locality became material for investigating ancient frog development.^[1][2]

The time range describes source context, not the complete duration of this species.

Size, form and skeleton

Eopelobatines are described as a group of frogs resembling toads externally. This species is studied from both tadpoles and postmetamorphic young. Examining changes in the same animal’s body during growth is central to its story.^[1]

Habitat and reproduction

Growth and metamorphosis themselves form an intriguing life-history story in this animal. In 2014, a researcher described development by comparing material from several stages. Small tadpoles and young frogs can be viewed as one sequence.^[1]

Fossil discovery

A 2014 study reexamined eopelobatine classification and also considered developmental material of bayeri. Tadpoles and young individuals from Bechlejovice provided the basis for comparison. It illustrates the value of a locality preserving multiple growth stages.^[1]

References

1. 2014 study — Eopelobates and frog growth
2. International Commission on Stratigraphy (2024) — Geological time chart
3. 1965 study — Fossil material of Vieraella
4. Reassessment study — Ancient frogs of South America

Research questions

Do frog fossils of different sizes and forms represent different species or growth stages? Comparing developmental evidence in order helps address this question. Understanding bodily transformation also connects to research on frog classification.^[1]

Observation

Imagine tadpoles alongside young individuals that have completed metamorphosis. Examining changes in trunk and limb organization extends the story of one species beyond a single moment.^[1]